package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     * @return
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        //只能查询到自己购物车的数据
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //判断当前商品是否在购物车中
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart); //返回的一定是只有一个值，因为要加也是加数量，但是select返回是一个集合
        if(list != null && list.size()>0){
            //如果已经存在，就在原来的数量上+1
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumberById(cart);
        }
        else {
            //如果不存在插入的数据number就是1
            //判断当前的商品是否是套餐
            if(shoppingCartDTO.getDishId()!=null){
                //如果是菜品
                Dish dish = dishMapper.getById(shoppingCartDTO.getDishId());
                shoppingCart.setDishFlavor(shoppingCartDTO.getDishFlavor());
                shoppingCart.setDishId(shoppingCartDTO.getDishId());
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }
            else {
                //如果是套餐
                Setmeal setmeal = setmealMapper.getById(shoppingCartDTO.getSetmealId());
                shoppingCart.setSetmealId(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());

            }

            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
       List<ShoppingCart> list = shoppingCartMapper.list(ShoppingCart.builder()
                .userId(BaseContext.getCurrentId()).build());
        return list;
    }

    /**
     * 清空购物车
     */
    @Override
    public void cleanShoppingCart() {
        shoppingCartMapper.delete(ShoppingCart.builder().userId(BaseContext.getCurrentId()).build());
    }
}
